@Retention(value=RUNTIME)
 @Target(value=METHOD)
public @interface OnError

This method level annotation can be used to decorate a Java method that wishes to be called in order to handle errors. See Endpoint.onError(javax.websocket.Session, java.lang.Throwable) for a description of the different categories of error.

The method may only take the following parameters:-

• optional Session parameter
• a Throwable parameter
• Zero to n String parameters annotated with the javax.websocket.server.PathParam annotation

The parameters may appear in any order.